>cd06133 ERI-1_3'hExo_like This subfamily is composed of Caenorhabditis elegans ERI-1, human 3' exonuclease (3'hExo), Drosophila exonuclease snipper (snp), and similar proteins from eukaryotes and bacteria. These are DEDDh-type DnaQ-like 3'-5' exonucleases containing three conserved sequence motifs termed ExoI, ExoII and ExoIII, with a specific Hx(4)D conserved pattern at ExoIII. These motifs are clustered around the active site and contain four conserved acidic residues that serve as ligands for the two metal ions required for catalysis. ERI-1 has been implicated in the degradation of small interfering RNAs (RNAi). 3'hExo participates in the degradation of histone mRNAs. Snp is a non-essential exonuclease that efficiently degrades structured RNA and DNA substrates as long as there is a minimum of 2 nucleotides in the 3' overhang to initiate degradation. Snp is not a functional homolog of either ERI-1 or 3'hExo.

Probab=98.02 E-value=1.8e-05 Score=58.57 Aligned_cols=149 Identities=11% Similarity=0.092 Sum_probs=88.7 Q ss_pred CCCCCCCCCCCCCCCC-----CCCCCEEECCCCCCCCCCCCCCEEC-C-----CC------CCCCCCCCCCCCCHHHHHH Q ss_conf 5232332224331100-----1244201025776654434550231-3-----74------4333456500178899997 Q gi|254780277|r 389 SASFKIITDTMDAFHS-----KPIAIAISTLDQKDDTSFKVETIFI-D-----LS------VHTSQDSTGKNTLTKEILS 451 (976) Q Consensus 389 ~ia~DtETt~ld~~~~-----~ivGisls~~~~~~~~~~~~~~~yi-p-----~~------~~~~~d~~~~~~~~~evl~ 451 (976) T Consensus 1 yvv~D~EtTg~~~~~~~~~~~eIIeIgav~vd~~~~~i~~~f~~lI~P~~~~~i~~~i~~itGIt~~~l~~ap~~~~v~~ 80 (176) T cd06133 1 YLVIDFEATCWEGNSKPDYPNEIIEIGAVLVDVKTKEIIDTFSSYVKPVINPKLSDFCTELTGITQEDVDNAPSFPEVLK 80 (176) T ss_pred CEEEEEECCCCCCCCCCCCCCCEEEEEEEEEECCCCEEEEEEEEEECCCCCCCCCHHHHHHHCCCHHHHHCCCCHHHHHH T ss_conf 98999726899878898999707999999998799979899999975876887898899773818878707863999999 Q ss_pred HHHHHHCCCCCHHHHCCCCHHHHHHH----HCCCC-CC----CCCCHHHHHHHHCCCCCCCCHHHHHHHHCCCCCCCCCC Q ss_conf 44442022210011003212378898----61886-66----42100234554316876677246677622444223356 Q gi|254780277|r 452 YLKKFFENEHFLKIGHNIKYDKLVLH----RYGIS-MR----GFEDIMLMSYVLDSGRSSHDIASIAQKWLSYTRKEILK 522 (976) Q Consensus 452 ~L~~lle~~~i~kIgHN~KfD~~~L~----~~GI~-l~----~i~DTmlaayLLdp~~~~~~L~~la~~yL~~~~~e~~~ 522 (976) T Consensus 81 ~f~~~i~~~~~~~~~~~~~fD~~~l~~~~~~~~~~~~~~~~~~~iD~~~~~~~~~~~~~~~sL~~l~~~~-gi~~~---- 155 (176) T cd06133 81 EFLEWLGKNGKYAFVTWGDWDLKDLLQNQCKYKIINLPPFFRQWIDLKKEFAKFYGLKKRTGLSKALEYL-GLEFE---- 155 (176) T ss_pred HHHHHHCCCCCEEEEEECCCHHHHHHHHHHHHCCCCCCCCCCCHHHHHHHHHHHHCCCCCCCHHHHHHHC-CCCCC---- T ss_conf 9999972698579996060029999999999789988730111204999999981888898999999986-99999---- Q ss_pred CCCCCCCCHHHCCHHHHHHHHHHHHHHHHHHHHH Q ss_conf 5432221000000123333222111112456776 Q gi|254780277|r 523 SRKSSIPIDKISDSQVQEHAIENSNVILQLWLLL 556 (976) Q Consensus 523 ~~k~~~~~~~i~~e~~~~Yaa~Da~~t~~L~~~l 556 (976) T Consensus 156 --------------~~~H~AL~DA~~ta~v~~~l 175 (176) T cd06133 156 --------------GRHHRGLDDARNIARILKRL 175 (176) T ss_pred --------------CCCCCCHHHHHHHHHHHHHH T ss_conf --------------98858599999999999987

HHsearch alignment for GI: 254780277 and conserved domain: cd06133